Antoine blahnik



(N0 Model.)

A. BLAHNIK. ELECTRIC ARC LAMP.

No. 595.936. v Patented Dec.21, 1897.

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ANTOINE BLAIINIK, ()F PARIS, FRANCE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 595,936, dated December 21, 1897.

Application filed July 10, 1896. Serial No. 598,728. (No model.) Patented in France February 4, 1896, No. 253,707.

To aZZ whom, it may concern:

Be it known that I, ANTOINE BLAHNIK, a subject of the Emperor of Austria-Hungary, and a resident of Paris, France, have invented a new and useful Improvement in Arc-Lamps, (for which I have obtained Letters Patent in France, No. 253,707, dated Februaryat, 1896,) of which the following is a specification.

My invention relates to an arc-lamp in which the distance between the two carbons, and consequently the size of the luminous arc, is regulated by disks upon an eccentric axis, the arrangement being such that variations in the resistance of the internal circuit of the lamp turns these disks and automatically regulates the separation of the points of the carbons.

The accompanying drawings represent, by way of example, two forms of installation of these lamps.

In the drawings, Figure 1 is a section taken vertically showing the upper part of a lamp, the section being on the line A B in Fig. 3. Fig. 2 is avertical section of the same on the line C D, Fig. 3. Fig. 3 is a horizontal section on the line E F, Fig. 2, the grooved pulley and disks being shown in plan. Fig. lis a plan view of the suspension device. Fig. 5 is a plan view from the lower side of the guidetubes of the carbon-carrier. Figs. 6 and 7 are respectively transverse and horizontal sections of the upper and the lower carbon carriers. Fig. 8 is a face view of the clamp for the lower carbon. Fig. 9 is a vertical section like Fig. 1, showing a variation in construction, the lower portion of the figure being in elevation.

In the form of lamp shown in Figs. 1 and 2 a grooved pulley 1 supports the carbon-carrier at the ends of a small cord 2, lying in the groove of the pulley. The latter turns on a central axis 3 and, as the upper-carbon carrier is usually the lightest, the pulley can easily keep the upper and lower carrier in proper relations. On the sides of the pulley 1 are disks 4 4, of soft iron or other magnetic metal. Said disks have nearly the same diameter as the pulley, but they turn on an cecentric axis 5 out of center of the pulley and the disks. On the edges of the disks and of the pulley rests an elastic band 6, which is stretched by springs 7 8. The band rests on the pulley 1, which slightly passes the disks on the sides, and it offers a certain resistance to the approach of the two carbons; but if the resistance of the lamp increasesas, for example, by the excess of waste of the carbonsa strong current will flow through the helices 9 9 of electromagnets having an armature 10 to attract the iron disks 1 4:, cansing them to turn in the direction of the arrow in Fig. 1 on their axis 5. As the latter is cocentric, the disks will lightly touch the clastic ribbon 6 on the pulley 1 and will carry said band with them, being connected to them by the pins 12, which lie in corresponding grooves in said band. The pulleyl can then turn freely and allow the carbons to return to their normal relations.

The pulley 1 and disks 4.- are carried on plates 13, and a center piece 14, attached to the disks, limits their upward movement. The disks are kept in their normal position by their own weight and by the action of the springs 7 and 8.

In the form shown in Fig. 9 the construction and function are the same save that the band 6 is replaced by a brake-shoe 15, attached to the disks 1-, its pressure on the pulley being regulated by a set-screw 16, pressing on the shoe through an interposed spring 17. The disks are drawn toward their position of rest by a coiled spring 18 and will return there as soon as the current in the coils 9 ceases.

In combination with the regulating mechanism I have devised a system of carboncarriers (shown in Figs. (3 to 9) and consisting of the following parts: The upper-carbon carrier 10 and the lower carrier 20, suspended at the two extremities of the cord 2, are each secured by a pin 21, guided at the two ends in the tube 22 by non-conducting balls 23 23. Upon the opposite side each carrier is guided by an external slide 21, containing isolating balls 25, of glass, porcelain, or other non-conducting substance, regulated as to their position by screws 26 in such manner that they will roll freely on the tube 22 and prevent contact of the latter with the slide 24:, the current traveling from the binding-posts of the lamp to the carbon-carriers by flexible wires. (Not shownin the drawings.) Thcupper-carbon carrier is composed of a frame of metal 27, in which are supported and guided two clamps 28 and 29. The upper carbon is engaged by the clamps and is secured therein by turning up the screws 32 and 313, which have milled heads for this purpose. tihen these screws are loosened, springs 30 and I open the clamps 2S and 20, and the carbon can easily be removed and replaced. The ar raugement is convenient in the sense that the two screws and being on opposite sides of the carbon-carrier the workman always finds one screw or the other of these screws convenient to either hand, whichever he may prefer to use. In the arrangement in Fig. 7 the carbon is held by two screws 37L and 35 between the body of the carrier 20 and a curved spring 733, which tends to push against the plate 19 20 of the carrier when the screws are turned up. The carriers rise and descend, each moving at one end in a slot 38 in one of the guide-tubes 22.

The invention is applicable to arc-lamps using a continuous direct current, as well as to those which use the alternatin current and to lamps connected in series or in parallel.

What I claim is- 1. In a regulating apparatus for arc-lamps,

the combination with a pulley of two rotary disks formed of magnetic metal and eccentrically supported on each side of the pulley, a flexible band lying upon the peripheries of said pulley and disks, means for applying tension to the band and an electromagnet and armature arranged to exert attraction on the disks proportioned to the variations in the current intensity, substantially as described.

2. In a regulatingapparatus for arc-lamps, the combination with a pulley, of two disks of magnetic metals eccentrically supported one on each side of the pulley, a flexible band lying upon the peripheries of the disks and pulley, means for applying tension to said band, an electromagnet and armature to attract said disks and remove more or less of the friction which the band exerts on the pulley, and carbon-carriers supported by the two ends of a cord carried by the pulley, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ANTOINE BLAIINIK.

Witnesses:

Enonons DE'LONE, t1. .YDE SHROPSHIRE. 

